the benefit of adjustable strut rods?
Through the course
of my restoration
project, I have done extensive research into Mustang
ways to improve it. Through this
research, I have learned that adjustable strut
are an obvious choice as a means to improve suspension and
To understand why they are so effective, you must first
function of the strut
rod in a classic Mustang. The strut rod is there to
lower control arm in a fixed position that prevents
forward and aft, but still alows it to travel vertically
compression and decompression. The stock system is
designed so that,
during regular driving, the rubber bushing gives, allowing
travel as the lower control arm moves up and down.
the bushings, unfortunately, has a negative side effect of
movement, they compress and stretch during braking and
The result of the compression and stretching of the rubber
an increase and decrease in the length of the strut rod.
As the strut
rod increases and decreases in length, the lower control
arm is not
fixed and can move forward and aft a small amount, which
the alignment in
a constant state of change during driving. One
option to remove the compression and stretching of the
bushings is to replace them with polyurethane bushings.
polyurethane reduces the movement of the strut rod, which
issue of compression and stretching, however, it has the
consequence in that it increases the
effort required for normal strut rod movement during
travel and puts far more strain on the strut rod than it
ever designed to
I have seen many times where people have bent or broken
rods by replacing the rubber bushings with polyurethane.
With negative side
effects from both
rubber and polyurethane, the challenge is to have a joint
freely moves vertically so as to not overtask and damage
rod, but is also fixed in such a way that it cannot shift
aft. This can be easily accomplished by using a heim joint
bushing end of the strut rod. An added benefit of a
system is that by having two threaded ends with opposite
on the heim joint and one at the base of the strut rod,
you can use a
threaded connecting tube and make the strut rods
adjustable for an
easier and more fine tuned alignment.
Susprnsion or IRS in
a classic Mustang
I : Why
the upgrade and Fords original IRS design
Where to find a
unit, taredown, and cleaning.
III, Narrowing of the LCAs and half shafts and
Jaguar bolt pattern to a Ford bolt pattern.